<template>
  <div :id="id" :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import tdTheme from './theme.json' // 引入默认主题
import echartMixins from '@/utils/resizeMixins'

export default {
  name: 'echart',
  mixins: [echartMixins],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    id: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '100%'
    },
    options: {
      type: Object,
      default: () => ({})
    }
  },
  data () {
    return {
      chart: null
    }
  },
  watch: {
    options: {
      handler (options) {
        // 设置true清空echart缓存
        this.setOption()
      },
      deep: true
    }
  },
  mounted () {
    this.$echarts.registerTheme('tdTheme', tdTheme) // 覆盖默认主题
    this.initChart()
  },
  methods: {
    initChart () {
      // 初始化echart
      const el = document.getElementById(this.id)
      this.chart = this.$echarts.init(el, 'tdTheme')
      this.setOption()
    },
    setOption() {
      this.chart.setOption(this.options, true)
      this.setFontSize()
    },
    setFontSize() {
      const baseSize = document.documentElement.style.fontSize
      const size = 38
      this.chart.setOption({
        tooltip: {
          textStyle: { fontSize: size }
        },
        textStyle: {
          fontSize: size
        },
        // grid: {
        //   containLabel: true,
        // },
        // legend: {
        //   textStyle: {
        //     fontSize: size
        //   }
        // },
        xAxis: {
          // type: 'category',
          axisLabel: {
            fontSize: size,
          }
        },
        yAxis: {
          // type: 'value',
          axisLabel: {
            fontSize: size,
          },
          splitNumber: 4,
        }
      })
    },
  }
}
</script>

<style>
</style>
